Dental paralleling instrument



y 7, 1953 v. w. MlNTZ I 2,644,235 I v DENTAL PARALLELING INSTRUMENT Filed June 12, 1952 IN VEN TOR. A MIy/MTZ 5 ATTORNEY Patented July 7, 1953 FUNIT-EID-Y'STVATES PATENT 'oFFI-cefl Precious Metals"Research Works, Inc., New York, N. Y.,"a corporation of New York Application June 12, 1952, Serial No. 293,150

4 Claims.

This invention relates to an improved device work in precision attachments for partial dental work. The device may be selectively secured to and removed from the conventional contra-angle in a simple and rapid manner, in certain of the forms thereof, for cooperation therewith without impeding the rotation of the burr.

Pursuant to the invention, a parallel pivot pin is slidably secured to an extension arm which is rotatably connected to the contra-angle head. The parallel pivot pin may be used for paralleling the grooves or teeth and to enable the operator to readily adjust the distance between the pivot and burr. By rotating the extension arm portion of the device, the operator may use teeth located in the portion of the jaw opposite that in which the pin is located, as a guide.

In the drawings:

Fig. 1 is a side elevational view of a dental paralleling device embodying my invention, shown secured to a dental contra-angle, the latter being shown fragmentarily,

Fig. 2 is an exploded fragmentary, partly perspective, view of one form of my invention and of the lower end of a dental contra-angle to which the same may be secured,

Fig. 3 is a side elevational view of another form of the invention, the dental contra-angle head being indicated fragmentarily,

Fig. 4 is a bottom plan view of a dental paralleling device embodying my invention, and

Fig. 5 is a side elevational view thereof.

As shown in the drawings, the device of my invention, which is generally indicated at In, is adapted to be secured to a contra-angle enerally designated at II, the latter having a head I2 to which a projecting burr I3 is secured by a nut, such as indicated by I4 in Figs. 2 and 3. The paralleling device of the invention may be otherwise secured to dental contra-angles within the spirit and scope of the invention as set forth in the appended claims.

The burr I3 projects through the nut I4 of the contra-angle head. As shown in the drawings, the device of my invention comprises an elon gated hollow tube I5 provided with a slot I6 axially coextensive therewith, an open ring I! extending from one end of the tube. gated bar I8 is slidably secured in said tube, said bar being of smaller cross-section than the tube, so as to be freely axially slidable therein. The rin is so proportioned as to be adapted to be secured to the head I2 by the nut I4 and is pref- An elonerably secured to the head su liici entl'y tightl'y' so as to not become'readily disengaged therefrom, while permitting the tube I5 to be rotatedjto the desired position without undue effort. A dental paralleling pin I9 is-sec'ured to the bar I8 adjacent one end 28 of the bar. A shorter stud 20 is secured to the bar intermediate the pin and the other end 2I of the bar for projection through the said slot. By the arrangement described, the pin I8 may be slidably disposed in the tube I5 and readily slid to that position therein desired for the particular application for which the device is being used.

In some cases it may be desirable to position the pin I9 substantially remote from the burr I3. In such cases the bar may be positioned within the tube I5 with the shorter stud 20 inserted first, as indicated in Figs. 4 and 5 In the form of invention shown in Figs. 1 and 2, the bar I8 is provided with a recessed shoulder portion 30 at that. end 28 of the bar to which the pin I9 is secured, so that where it is desired that the pin be extremely close to the burr I3,

the bar may be moved against the contra-angle head I2, as shown in Fig. l, with the nut end of the contra-angle head received within the shoulder portion 30, permitting close disposition of the pin I9 relative to the burr I3. For the same purpose the form of invention shown in Fig. 3 may be used, wherein the paralleling pin comprises an upper pin portion 25 secured to the bar at the end 28 thereof and a lower portion 26 of said pin connected to the upper portion 25 by a neck portion 21 so as to be offset past the end 28 of the bar. In this form of invention, when the bar is moved against the contra-angle head, as

The foregoing description and drawings are illustrative of the essential features of the inven- 'tion in practical embodiments thereof; all other forms suggested thereby coming Within the scope of the appended claims are to be deemed within the scope and purview of this invention.

Having thus described my invention, what I claim as new'and desire Patent is:

1. A dental paralleling device for use in conto secure by Letters and the other end of thew-bar,aformrojection through said slot.

2. In a dental paralleling device. ascsetiorth in claim 1, said pin comprising anlupper pinlportion connected to the bar at theerid'of the'bar, and a lower end portion connected in ofi-setfrelation thereto by a neckportion, so as to dispose tharlower-end portion past the end of the bar,

ecloserto the burr when thetdeviceis. assembledon a-a contraeangle with: the bar moved into A engagezament ,with. the contra-angle.

.-In-adental:para1le1ing device as set forth in claim 1, a recessed shoulder portion at the end of the bar to which the pin is secured, adapted to receive the nut endof the burr when the device is assembled on the contra-angle, to dispose the pin closer to the burr when the device is assembled on a contra-angle with the bar moved into: engagement withthenontra-angle.

4. Ini-a', dental paralleling 1 device as set forth in claim 1, said pin comprising an upper pin portion connected to the bar at the end thereof, and

a lower end portion connected thereto in offset relationby =a neck portion, so as to dispose the -lower end portion past the end of the bar, closer to thei burr -whenthe device is assembled on a .contra-anglewith the bar moved into en agement with the contra-angle.

VICTOR W. MINTZ.

References Cited in the file of this patent UNITED STATESPATENTS Number Name Date $2,399,231 Klein Apr." 30, 19.46

Mintz c Apr. 1, 1952 

